Telephone-transmitter.



A. DEWINSKY.

TELEPHONE TRANSMITTER.

APPLICATION FILED mm: 30. m1.

1,263,537; Patented Apr. 23,1918.

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amutoc HHRON iDEwmsKY AARON DEWINSKY, 0F BETHLEHEM, PENNSYLVANIA.

TELEPHONE-TRANSMITTER.

Specification of Letters Patent.

Patented Apr. 23, 1918.

Application filed June 30, 1917. Serial No. 177,933.

1 0 cat 'w/wm ct may concern.

Be it known that I, AARON Dnwmsnr, a naturalized citizen of the United States, residing at Bethlehem, in the county of Lehigh and State of Pennsvlvania, have invented certain new and useful Improvements in Telephone-Transmitters, of which the following is a specification, reference being had to the accompanying drawings.

This invention re ates to certain improvements in telephone transmitters and it is an object of the invention to provide a device of. this general character with novel and improved means whereby the transmitter may e closed to prevent passage of sound waves.

it is also an oh'ect of the invention to providea novel an. improved device of this general character wherein the entrance of sound is obstructed by tWo relatively movable-perforate disks'togother with means for normally maintaining the openings of said disks in registry: t

The invention has for a further object to provide a novel and improved transmitter wherein two relatively movable perforate disks obstrnct the entrance or sound open ing togetherswith automatic means for lockin}; the disks against relative movement when the openings thereof are out of registry.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved telephone transmitter wherein certain important advantages are attained and the.device rendered simpler, less expensive and otherwise more convenient and advantaeous for use, as will be hereinafter more ully set forth. r

' The novel features of my invention will hereinafter he definitely claimed.

In order that my invention may be the better understood I will now proceed to describe the same with reference to the accompanying drawings, wherein Figure 1 is a fragmentary view in side ele vation with a portion broken away i]lus trating a transmitter constructed in accord ance with an embodiment of my invention; Fig. 2 is a view in rear elevation of the fbrward section of the transmitter casing as herein disclosed, and

Fig. 3 is a vertical sectional view taken through the device as illustrated in Fig. 2.

As disclosed in the accompanying draw-- illgs C denotes a transmitter case formed preferably of two sections maintained in as sembled relation through the medium of the clamping bolts 1 or the like. The forward section of the casing is provided with an entrance opening for sound defined by the outstanding mouthpiece 2. The inner end of the mouthpiece 2 is intersected by the two stationary disks 3 provided with perforations t thercthrough, the perforations 4 of one of the disks 3 being in registry with the perforations of the second disk.

Disposed through the disks 3 at the axial center of the entrance opening is a pin 5 which serves as an axis for a rockin disk 6 interposed between the disks Radiating from the disk 6 is an arm 7 which extends exteriorly of the casing 0 through a suitable slot 8 produced in the forward section thereof. '11s arm 7 is also disposed between the two stop members 9 extending inwardly'of the casing C and carried by the outer seetionthereof. The stops 9 serve to limit the rotary movement of the disk 6 in either direction. The disk 6 is provided with perforations or openings 10 adapted. to rogistel with the openings 4 of the disks 3 when said disk 6 is at the limit ofits movement in one direction. When at the limit of its movqpu-nt in the opposite direction the perforations or openings 10 of the disk. 6 are out of registry with the openings 4 wherehy the transmitter is closed against sound Waves. 1t ill be readily understood that the transmit er may be closed when using the receiver in order to prevent conversation of anykind from passing through the telephone at such time and In order to permit the operator to close the transmitter in order to carry on a conversation with others adjacent the telephone without such conversation passing through the telephone. The disk 6 is normally maintained with its open lugs or perforations 10 in registry with the openings or perforations 4 of the disk 3 through the medium of the retractilo memher 11 herein disclosed as a conventional coil spring positioned within the forward section of the casing C and havin one extremity anchored to the arm 7 and its opposite end portion to the inner face of the forward section of the casing C.

Secured to the under surface of the forward' section of the casing C is a flat spring 12 anchored at one end portion and having its opposite end portion provided with a pin 14 loosely extending through an opening 15 produced in the peripheral portion of the forward section of the casing C and which obstructs the line of travel of the arm 7. As the arm 7 is moved to cause the perforations or openings 10 of the disk 6 to be moved out of re istry with the openings or perforations 4 0 the disk 3, the arm 7 will ride over the extended portion of said pin 14 and be held thereby against return movement. In order to facilitate the passage of the arm 7 the outer or extended end portion of the pin 14 is beveled as indicated at 16.

In order to disengage the pin 14 from the arm 7 I provide the sprin 12 with a second in 17 extending exteriorly of the forward section of the casing and which is adapted to be forced inwardly by a finger.

, When the pin 14 is disengaged from the .perforate disk intersecting arm 7, the retractile member 11 will automatically move-the disk 6 to its limit of movement to brin the perforations 10 thereof in registry {wit the perforations or openings 4.

From the foregoin description, it is thought to be obvious tEat a telephone transmitter constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it ma be assembled and operated and it will a so be obvious that my invention is susceptible of some change and modification without materially departing from the appearance and spirit thereof and for this reason I do not wish'to be understood as limiting myself to the precise arrangement and formation of the several parts herein, shown in carrying out my invention in practice except as hereinafter claimed.

I claim: i

1. In' combination with a transmitter casing and an entrance openin therefor, a sa opening, a

rotary disk co-aeting wit the first named disk and provided with perforations adaptedto register with the perforations of the first named disk, an arm radiatin from said rotary disk and extending exteriorly of the casing,-means co-acting with said arm for limiting the movement of the disk in 0p posite directions, automatic means for normally maintaining the rotary disk at the limit of its movement in one direction, afiat spring secured within the casing, a pin carried by said spring and extending exteriorl of the casing and co-acting with the extend ed portion of the arm [or holding the rotary disk at the limit of its movement in the opposite direction.

2. In combination with a transmittercasing and an entrance openin therefor, a perforate disk intersecting said opening, a rotary disk co-actin with the first named disk and provided with perforations adapted to register with the perforations of the first named disk, an arm radiating from said rotary disk and extending exteriorly of the casing, means co-acting with said arm for limiting the movement of the disk in oppo site directions, automatic means for normally maintaining the rotary disk at, the limit of its movement in one direction, a fiat sprin secured within the'casing, a pincar ried y said spring and extending exteriorly of the casing and co-acting with the extended portion of the arm for holding the rotary disk at the limit of its movement in the opposite direction, and means carried by the spring extending exteriorly of the casing for forcing the pin out of engagement with the arm.

In testimony whereof I hereunto affix my signature in the presence of two witnesses,

AARON DEWINSKY.

Witnesses Pnns'ron HALTEM an ANNA T-TAL'IFEMAW 

